The development of PIV–PSP hybrid system using pressure sensitive particles

A method for visualizing the spatial distribution of oxygen using particles coated with pressure-sensitive dye is presented. The proposed technique, called the PSParticle method, is a hybrid system combining the technologies of pressure-sensitive paint (PSP) and particle image velocimetry (PIV) and allows the particle velocity and oxygen distribution to be measured simultaneously. As intensity-based imaging is not applicable in this system, a luminescence lifetime-based imaging technique involving double frame imaging is introduced. The system is calibrated and demonstrated in application to measurement of the oxygen distribution in an air jet.